Answers - Dry Ice and Dunes

Hi everyone

Well it has been really cold over the past few mornings where I live and I was happy not to be living anywhere near the Mars North Pole ;-)

Here are the answers to the Dry Ice and Dunes on Mars post. I hope you did OK if you tried to do it. Watch out for another post coming along in the next few days....!
    
What kind of planet do we tend to think Mars is? We think of Mars as a dead planet, where all the exciting geologic activity happened millions of years ago.

What sort of planet is it actually? It's a dynamic place.
 

What is at the North Pole of Mars? Mars has a permanent ice cap made up of water ice at its North Pole.

What surrounds this feature? Sand dunes surround this feature.

What is the name of the rock found there and what is it likened to on Earth? The rock is called Basalt. It is like the rock found around Hawaiian volcanoes.

In what seasons does it get extremely cold? It gets extremely cold in Fall and Winter.

What happens to the ground when it is cold? The ground gets covered with a layer of seasonal Carbon dioxide ice (or dry ice) that's about 1 to 2 feet thick.

 

The sequence of events during Spring is described several times. List the main events in the final explanation that is given.  The dunes are ice-covered in the early spring. Some areas of the ice rupture and crack, allowing sand and dust to escape along with the escaping gas. The gas from the dry ice destabilizes the slopes, reshaping the dunes. 
 

How often does this happen? It happens every Spring.

What conclusion is offered with regard to Mars and Earth?Mars may look Earth-like but in some ways it is a very different planet.

Any questions? Send me a message using the box below.